E103-W20 (7628) OpenWrt IoT Wireless Routing Module
The E103-W20 (7628) is a compact OpenWrt-based serial-to-WiFi routing module featuring MediaTek's MT7628AN SoC with 580MHz processing power, 20-24dBm transmission, and full custom development capabilities.
Key Features
Open-Source Flexibility
Runs OpenWrt operating system for complete customization and firmware development freedom.
High-Performance Processing
MT7628AN SoC with 580MHz MIPS CPU handles complex networking tasks and simultaneous connections.
Industrial-Grade Wireless
20-24dBm transmission power with IEEE802.11b/g/n support ensures reliable 200m+ connectivity.
Rich Interface Options
Exposes all MT7628AN interfaces including UART, SPI, I2C, Ethernet, and USB for peripheral expansion.
Compact Form Factor
Ultra-small 34.1×18.7×2.77mm SMD design enables integration in space-constrained applications.
Technical Specifications
Core Components
- SoC: MediaTek MT7628AN
- CPU: 580MHz MIPS 24Kc
- Memory: 128MB DDR2 RAM + 16MB SPI Flash
Wireless Capabilities
- WiFi Standard: IEEE 802.11b/g/n
- Frequency: 2.4GHz
- TX Power: 20-24dBm (adjustable)
- Sensitivity: -95dBm @ 11n MCS0
Physical Dimensions
- Size: 34.1×18.7×2.77mm
- Weight: 3.5g ±0.1g
- Antenna: Integrated PCB antenna
Power Requirements
- Operating Voltage: 3.3V DC
- Power Consumption: 500mA typical
Application Scenarios
Industrial IoT Gateways
Convert legacy serial devices to WiFi-enabled smart sensors in manufacturing environments.
Custom Network Appliances
Develop specialized routers, VPN gateways, and network security devices with OpenWrt flexibility.
Smart Home Controllers
Create hub devices for home automation systems with protocol translation capabilities.
Wireless Sensor Networks
Build distributed monitoring systems for agriculture, environmental sensing, and equipment tracking.
Retail Automation
Power digital signage controllers, payment terminals, and inventory management systems.
| Electrical parameters | unit | model |
Remark | ||
| E103-W20（7688） | E103-W20（7688） | ||||
| working voltage | V | 3.3±0.2V | Voltage over 3.5 V will permanently burn the module | ||
| communication level | V | 3.3 | Voltage over 3.5 V will permanently burn the module | ||
| No-load running current | mA | 180±50 | Average power consumption | ||
| Supply Current Requirement | mA | ≥1000 | |||
| temperature | Operating temperature |
℃ | -20～+55 | Industrial grade | |
| Storage temperature |
-40～+85 | ||||
| humidity | use | %RH | 10～95(non-condensing) | ||
| storage | 5～95(non-condensing) | ||||
| Hardware parameters | model | Remark | ||
| E103-W20（7688） | E103-W20（7688） | |||
| chip |
MT7688NN | MT7628NN | ||
| Flash | 32MB | Customizable 16MB/8MB | ||
| Memory |
DDR2 128MB | Customizable DDR2 256M/64M/32MB | ||
| Memory |
MIPS24KEc | |||
| Packaging method patch | SMD | |||
| Antenna interface | IPEX×1 （1T2R 2.4 GHz with 150Mbps PHY data rate） |
IPEX×2 （2T2R 2.4 GHz with 300Mbps PHY data rate） |
Characteristic impedance about 50 ohms | |
| interface | Ethernet interface |
5 10M/100M adaptive | Interfaces supported by factory default firmware 1WAN, 4 LAN . | |
| UART | 3 way |
The interfaces supported by the firmware are 2-way UART with transparent transmission function . |
||
| SDIO | 1 way | Firmware interface not supported | ||
| SPI | 1 way | Firmware interface not supported | ||
| I2C | 1 way | Firmware interface not supported | ||
| I2S | 1 way | Firmware interface not supported | ||
| PWM | 1 way | Firmware interface not supported | ||
| GPIO | 8 or more Firmware | Supported Interfaces Defined Functions | ||
| size | 34.1*18.7*2.7mm | 36.1*18.7*2.7mm | The error size is ±0.1mm | |
|
Note: 1. The default firmware of the module is the firmware developed by our company based on Linux; Ethernet, WiFi, UART0 and |
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| RF parameters | unit | Model | Remark | |
| E103-W20（7688） | E103-W20（7688） | |||
| transmit power | dBm | 20～24 | ||
| transmit power |
- | IEEE 802.11b/g/n | ||
| Ideal Range Meter | M | 200 | Antenna gain 5dBi , in a line of sight | |
| main frequency |
MB | 580 | ||
